Massachusetts LLC Act: Formation, Management, and Compliance

The Massachusetts LLC Act, codified at M.G.L. Chapter 156C, sets the ground rules for forming, running, and dissolving a limited liability company in the Commonwealth. It tells you what has to go in your formation papers, how management and fiduciary duties work, when your personal liability shield can be pierced, what you owe the state each year, and how a legal dissolution actually happens. Forming an LLC costs $500 in state filing fees, and keeping it in good standing costs another $500 every year.¹

Forming the LLC: The Certificate of Organization

A Massachusetts LLC comes into legal existence only when the Secretary of the Commonwealth approves its Certificate of Organization. Section 12 of the Act spells out what the certificate must contain:²

The LLC’s name, which must include “Limited Liability Company,” “Limited Company,” or an abbreviation such as LLC, L.L.C., LC, or L.C., and which cannot be the same as or deceptively similar to any existing corporation, limited partnership, or LLC on the state’s rolls.³
The Massachusetts street address where the LLC will keep its records.
The name and address of a Massachusetts resident agent authorized to accept legal documents, with that agent’s written consent.
If manager-managed, the name and address of each manager.
A brief statement of the general character of the business.
At least one person authorized to file documents with the Secretary of the Commonwealth. If no managers are named, at least one authorized signer must be identified here.

The filing fee is $500, with a small additional convenience fee for online filings.¹ The LLC does not exist until the state approves the certificate.

The Operating Agreement

Chapter 156C does not require a written operating agreement, but without one the LLC runs on the statute’s default rules, and those defaults rarely match what the members actually had in mind. The agreement is an internal document kept by the members. It is not filed with the state.

A workable agreement covers ownership percentages, how profits and losses are allocated, each member’s capital contribution, voting rights, and who has authority for day-to-day decisions versus major ones. It should also describe how new members are admitted, how disputes are resolved, and how the agreement itself can be amended.

Buy-Sell and Transfer Provisions

In a multi-member LLC, the buy-sell clause controls what happens to an owner’s interest when they leave. Common triggers include death, permanent disability, retirement, divorce, bankruptcy, or a simple decision to cash out. Without transfer restrictions, a departing member’s interest can end up with a divorcing spouse’s attorney or a bankruptcy trustee, which is a problem the remaining members did not sign up for.

A buy-sell clause typically gives the LLC or the remaining members the right to purchase the departing interest at a price set by a formula or appraisal method written into the agreement. LLCs with meaningful value often fund the obligation with life or disability insurance so cash is on hand when the trigger hits.

Management Structure

Every Massachusetts LLC is either member-managed or manager-managed, and the Certificate of Organization has to indicate which. Under Section 24, management defaults to the members unless the operating agreement assigns it to one or more managers.⁴

In a member-managed LLC, any member can sign documents and bind the company. That fits small businesses where every owner is active in operations. In a manager-managed LLC, the managers have exclusive authority to run the business and execute documents, and individual members cannot bind the company unless the operating agreement says otherwise. This structure suits investor-backed LLCs and any arrangement with passive members.

Either structure can be customized. The operating agreement can delegate authority to agents or employees, create committees, or require supermajority votes for decisions like taking on debt or selling major assets. The statute gives wide latitude, so the real governance rules live in the agreement.

Fiduciary Duties

Members and managers owe fiduciary duties to the LLC and to each other, including duties of loyalty and care. Section 63 lets the operating agreement expand or restrict those duties and protects people who rely in good faith on the agreement’s terms.⁵ The statute says “restricted,” not “eliminated.” Massachusetts courts generally treat the implied covenant of good faith and fair dealing as a floor the operating agreement cannot remove.

In practice, a manager who self-deals, takes a business opportunity for themselves, or acts to benefit themselves at the LLC’s expense can be sued for breach of fiduciary duty. The operating agreement can define what counts as a breach and lay out procedures for resolving the dispute, but it cannot license a manager to work against the LLC.

The Liability Shield and When Courts Pierce It

The reason to use an LLC is the shield. Section 22 says the debts of the LLC belong to the LLC, not to its members or managers, whether those debts come from contracts, lawsuits, or anything else.⁶

The shield has limits. Massachusetts courts will pierce the veil when the LLC is being used as a shell rather than a genuine business. In Attorney General v. M.C.K., Inc., the Supreme Judicial Court disregarded entities controlled by a single person after finding they were essentially alter egos of the owner.⁷ The courts weigh roughly a dozen factors. The ones that come up most often:

Commingling personal and business funds so there is no clear line between the owner and the LLC.
Thin capitalization, meaning the LLC was funded with so little money it could not reasonably pay its debts.
Ignoring formalities, like failing to keep separate records or maintain the LLC as a distinct entity.
Siphoning funds out of the LLC for personal use rather than as legitimate distributions.
Using the LLC to promote fraud or evade legal obligations.

No single factor is automatically fatal; courts look at the whole picture. The fastest way to lose the shield is to treat the LLC’s bank account like your own checking account. Keep finances separate, capitalize the business adequately, and document major decisions in writing.

Annual Report and Ongoing Compliance

Every Massachusetts LLC has to file an annual report with the Secretary of the Commonwealth. It is due on the anniversary of the LLC’s original formation date and repeats the categories in the Certificate of Organization: name, office address, resident agent, managers, and authorized signers.² The filing fee is $500.¹

Missing the annual report puts the LLC’s good standing at risk and can eventually lead to administrative dissolution. If the resident agent or office address changes during the year, file the update promptly. An LLC that cannot be served with process because its agent information is stale can end up with default judgments it never saw coming.

LLCs in regulated fields such as construction, food service, or professional services may also need separate state or local licenses. Those sit outside Chapter 156C and have their own renewal schedules.

Tax Treatment

How Massachusetts taxes an LLC depends on how the LLC is classified federally. By default, a single-member LLC is a disregarded entity and all income flows to the owner’s personal return. A multi-member LLC is treated as a partnership, with each member reporting their share. Either can elect C-corporation or S-corporation treatment by filing the right form with the IRS.

Massachusetts does not impose a separate entity-level income tax on LLCs taxed as partnerships or disregarded entities. Members pay the state’s personal income tax on their share at the standard 5% rate.⁸ A 4% surtax applies to any individual’s taxable income above the surtax threshold, which was $1,083,150 for tax year 2025 and adjusts annually for inflation.⁹ High-earning members can face an effective 9% rate on income above that line.

S Corporation Election

An LLC that elects S-corporation status in Massachusetts faces a tiered entity-level excise based on gross receipts. For non-financial-institution S corporations:¹⁰

Under $6 million in gross receipts: no income-measure excise, though the $456 minimum excise and the non-income measure still apply.
$6 million to under $9 million: 2% on net income subject to tax.
$9 million or more: 3% on net income subject to tax.

One restriction matters for planning: multi-member LLCs are not eligible to hold shares in an S corporation under Massachusetts rules, so this election is primarily relevant for single-member LLCs or those that have restructured their ownership.¹⁰

Dissolving the LLC

Dissolution is a legal event with defined triggers. Under Section 43, a Massachusetts LLC dissolves on the first of these to occur: the time or event specified in the operating agreement, the written consent of all members, or a court decree ordering dissolution.¹¹ For LLCs formed before January 1, 1997, the death, bankruptcy, or withdrawal of a member also triggers dissolution unless the remaining members consent to continue within 90 days or the operating agreement provides for continuation.

A court can force dissolution under Section 44 when it is no longer reasonably practicable to carry on the business in line with the certificate of organization or operating agreement.¹² This usually surfaces when members are deadlocked and nothing in the operating agreement can break the tie.

Certificate of Cancellation

After dissolution and after winding up, the LLC files a Certificate of Cancellation with the Secretary of the Commonwealth under Section 14. It must include the LLC’s name, the date its Certificate of Organization was filed, and the reason for cancellation.¹³ Before filing, settle debts, notify creditors, and distribute remaining assets according to the operating agreement.

Skipping this step is a common and expensive mistake. An LLC that stops operating but never cancels its certificate stays on the state’s books and keeps owing the $500 annual report fee, with penalties piling on. Close the LLC’s accounts with the Massachusetts Department of Revenue and the IRS at the same time so ongoing tax obligations stop as well.

Foreign LLCs Doing Business in Massachusetts

Chapter 156C also reaches LLCs formed in other states. An out-of-state LLC that conducts business in Massachusetts must register as a foreign LLC with the Secretary of the Commonwealth. “Doing business” generally includes maintaining a physical office, employing workers, owning real estate, or regularly performing services in the state. Occasional contact, like attending a single trade show, typically does not require registration.

Registration requires an application, a certificate of good standing from the home state, a designated Massachusetts resident agent, and the applicable filing fee. An LLC that operates in Massachusetts without registering cannot bring suit in Massachusetts courts until it registers and pays any back fees, which tends to become a problem at the worst possible moment.

1
Mass.gov. Starting a Limited Liability Company in Massachusetts
2
General Court of Massachusetts. Massachusetts Code Chapter 156C Section 12
3
General Court of Massachusetts. Massachusetts Code Chapter 156C Section 3
4
General Court of Massachusetts. Massachusetts Code Chapter 156C Section 24
5
General Court of Massachusetts. Massachusetts General Laws Chapter 156C Section 63
6
General Court of Massachusetts. Massachusetts Code Chapter 156C Section 22
7
Justia. Attorney General and Another vs. M.C.K., Inc., and Others
8
Massachusetts Department of Revenue. Massachusetts Tax Rates
9
Massachusetts Department of Revenue. Massachusetts 4% Surtax on Taxable Income
10
Massachusetts Department of Revenue. S Corporations
11
General Court of Massachusetts. Massachusetts General Laws Chapter 156C Section 43
12
General Court of Massachusetts. Massachusetts Code Chapter 156C Section 44
13
General Court of Massachusetts. Massachusetts General Laws Chapter 156C Section 14